Simplify the 21-12+9+(-17)
Answers
Step-by-step explanation:
Given expression:
= 21 - 12 ÷ 3 ⨯ 2
= 21 - 4 ⨯ 2 [Performing division]
= 21 - 8 [Performing multiplication]
= 13 [Performing subtraction]
Page No 107:
Question 2:
Simplify:
16 + 8 ÷ 4 − 2 × 3
ANSWER:
Given expression:
= 16 + 8 ÷ 4 - 2 ⨯ 3
= 16 + 2 - 2 ⨯ 3 [Performing division]
= 16 + 2 - 6 [Performing multiplication]
= 18 - 6 [Performing addition]
= 12 [Performing subtraction]
Page No 107:
Question 3:
Simplify:
13 − (12 − 6 ÷ 3)
ANSWER:
Given expression:
= 13 - (12 - 6 ÷ 3 )
= 13 - (12 - 2) [Performing division]
= 13 - 10 = 3 [Performing subtraction]
Page No 107:
Question 4:
Simplify:
19 − [4 + {16 − (12 − 2)}]
ANSWER:
Given expression:
= 19 - [4 + {16 - (12 - 2)}]
= 19 - [4 + {16 - 10}] [Removing parentheses]
= 19 - [4 + 6] [Removing braces]
= 19 - 10 [Removing square brackets]
= 9