Unit 3&4

Write down the missing number

18 + ____=100

Write down the missing number

126 + ____= 249

Write down the missing number

325 + ____ = 550

Write down the missing number

632 + ____= 688

Add a number to balance the calculations:

a

d

204

304

130

190

Write the missing numbers to make each the numbers along each edge add to 90

a

b

d

80

60

40

70

Add 30, 40, 50 and 60 to the number triangle so numbers along each edge add to 90

b

a

c

d

60

40

30

50

Complete the addition question:

a

b

c

115

114

65

Complete the number wall so that each box is the total of the two below it:

a

c

d

93

45

64

48

You will breathe in the next minute. ​ (a)  

• certain
• no chance
• poor chance