Show:
Addition
Subtraction
Use Base Ten to Build Two-Digit Number
100

1+9=

10

100
10-8=

2

100

How many Tens in 76?

7

200

15+4=

19

200

12-10=

2

200

How many Ones in 89?

9

300

7+3+8=

18

300

20-15=

5

300

What is the value of 6 in 62?

60

400

10+3+5=

18

400

20-10=

10

400

Using Base Ten, Build 34

3 Rods, 4 Units

500

50+7=

57

500

40-20=

20

500

Using Base Ten, Build 86

8 Rods, 6 Units