Question

21 x ________ ÷ 3 = 21 *

1. 7
2. 21
3. -3
4. 3


b x h ÷ h = ________ *
1. a
2. h
3. b
4. c


876 x 3.2 ÷ ______ = 876 *
1. 3.2
2. 876
3. -3.2
3. 1
what are the answers?

Answer 1

first one: 3

second one: b

third one: 3.2

Explanation:

first one:

21 x ________ ÷ 3 = 21

rewrite equation:

21 ÷ 3 x ___ = 21

7 x ___ = 21

(21 / 7 = 3)

7 x 3 = 21

second one:

b x h ÷ h = ___

B

third one:

876 x 3.2 ÷ ______ = 876

2803.2 ÷ ___ = 876

(2803.2 / 876 = 3.2)

2803.2 x 3.2 = 876