(1) ADDING SIMPLE WEIGHTS 3 BEFORE ME€¦ · Success Criteria Some will even apply this to a range of problems. Some willadd and subtract grams (bridging/exchanging). Most will add

a)

b)

c)

d)

e)

f)

g)

RECALL (1) – ADDING SIMPLE WEIGHTS 3 BEFORE ME

Look at the different food masses/weights and complete the addition problems. Solve them mentally.

h)

i)

j)

k)

l)

m)

n)

Use the column addition method to help you add the gram values.

a)

b)

c)

d)

e)

f)

g)

RECALL (2) – SUBTRACTING SIMPLE WEIGHTS 3 BEFORE ME

Look at the different food masses/weights and complete the subtraction problems. Solve them mentally.

h)

i)

j)

k)

l)

m)

n)

Use the column subtraction method to help you subtract the gram values.

Success Criteria

Some will even apply this to a range of problems.

Some will add and subtract grams (bridging/exchanging).

Most will add and subtract grams (no bridging/exchanging).

All will know that adding weights increase the mass and subtracting weights reduce the mass.

LEARNING HABITS?

GUIDED PRACTICE

To add or subtract these gram values, you could use column addition or subtraction.

(525g) (250g)

(375g) (160g)

How much do the carrots and onions weigh altogether?

Here are some items I have put in my shopping basket.

How much do the carrots and leeks weigh altogether?

How much do the leeks and broccoli weigh altogether?

I pick up 250g of onions and then put back 150g. How many grams of onions do I have left?

Adding Subtracting

I pick up 525g of carrots but put 150g back. How many carrots do I have left?

I pick up 375g of leeks but put 196g back. How many leeks do I have left?

3 BEFORE ME

• Pepper + pepper

• Broccoli + pepper

• Cauliflower + pepper

• Cauliflower + broccoli

INTELLIGENT PRACTICE 3 BEFORE ME

• Onion + pepper

• Mushrooms + broccoli

• Tomatoes + broccoli

• Sweetcorn + cauliflower

• Mushroom + tomatoes

• Sweetcorn + tomatoes

• Onion + tomatoes

• Onion + onion + onion

Create your own + - problems based on these foods. Use more than 2 items.

A selection of fruit and vegetables from the shop, measuring in grams.

Complete all questions in your maths book, using column addition or subtraction as a method.

(125g) (150g) (100g) (275g)(425g)(500g) (300g)

• Broccoli – 100g

• Cauliflower – 200g

• Onion – 50g.

• Tomatoes – 75g.

• Tomatoes – 150g

• Sweetcorn – 325 g

• Mushroom – 110g

• Onion – 120g

• Mushrooms – 75g

• Sweetcorn – 350g

• Tomatoes – 185g

• Cauliflower – 395g

Add these weights together.

a)

b)

c)

d)

e)

Complete these sentences using these words.

When you add in grams, the numbers ________. When you subtract in grams, the numbers __________.

1

2

DIVE DEEPER 1 The chocolate bar is lighter than the weights. There are two 50 gram weights. How much do the weights weigh?

3

4

5

These scales are perfectly balanced. How much does the spinning toy weigh?100g + 200g = ___g

200g + 200g +

100g = ___g

500g + 100g = ___g

500g + 200g +

100g = ___g

500g + 200g +

200g + 100g

= ___g

1

2

DIVE DEEPER 2 3 Draw the arrow to show the total weight of the fruit or vegetables on each scale.

Look at the dial on each scale.

The carrots weigh ____g. If I add 250g, it will weigh ____g.

The fish weighs ____g. If I add 250g it will weigh ____g.

The mushrooms weigh ___g.

If I subtract 50g, I will have ___g.

If I subtract 150g,I will have ___g.

If I subtract 250g, I will have ____g.

_____g - ______g = 0 grams

1

2

3

DIVE DEEPER 3 4

5

6

The packet of flour has ____g inside it.

On Monday, I use 50g. How much is left?

On Tuesday, I use 200gfrom what was left. How much is left now?

On Friday, there is __gleft, and I use half to bake a cake. How much is left now?

The mass of the grapes is ____g. I eat 321g of them. Write the subtraction number sentence and work out the answer using column subtraction.

____g - ____g = ____g

In your maths book, solve:• 978g – 546g using column subtraction. • 491g + 304g using column addition.

I buy a 1kg bag of sugar.

On Monday, I use 150g, how much do I have left?

On Tuesday, I use 125g, how much do I have left?

On Wednesday, I use 275g,how much do I have left?

On Thursday, I use 396g, how much is left?

If I have less than 100g left, I need to buy a new bag. Should I buy a new bag or not? Explain. ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….

• Start with 0g and add different 3 digit numbers to it.

• Start at 1000g and subtract different 3 digit numbers to it.

How many different combinations can you do for each problem? Show your method.