Math grade 1 week 4

How can you make a 10 to subtract

13-5=?

• 5=3+2

  13-3=10

  10-2=8

• 5=4+1

  13-4=9

  9-1=7

• 5=3+2

  13-2=11

  11-2=9

How can you make a 10 to subtract

15-8=?

• 8=5+3

  15-5=10

  10-3=7

• 8=5+3

  15-3=12

  12-5=8

• 8=6+1

  15-6=9

  9-1=8

How can you make a 10 to subtract

11-4=?

• 4=1+3

  11-1=10

  10-1=9

• 4=2+2

  11-2=9

  9-2=7

• 4=1+3

  11-1=10

  10-3=7

What is the difference?

9-6=?

• 5

• 4

• 3

What is the difference?

15-9=?

• 4

• 6

• 5

Which equation does the ten frame show?

• 15-6=9

• 12-7=5

Which equation does the the ten frame show?

• 12-7=5

• 12-6=6

How can you use addition equation to help you to subtract

12-8=?

• 8+4=12

  so12-8=4

• 8+4=12

  so12+8=20

How can you use addition equation to help you to subtract

15-8=?

• 8+7=15

  so,

  15+8=23

• 8+7=15

  so,

  15-8=7

What two fact complete the fact family ?

6+7=13

7+6=13

• 13-6=7

  13-7=9

• 13+6=19

  13+7=20