Ex 1.3, 3 - Chapter 1 Class 7 Integers

Transcript

Ex 1.3, 3 Fill in the blanks: (a) 369 ÷ _____ = 369 369 ÷ _____ = 369 𝟑𝟔𝟗/⎕ = 369 369/369 = ⎕ ⎕ = 369/369 ⎕ = 1 ∴ 369 ÷ 1 = 369 Ex 1.3, 3 Fill in the blanks: (b) (–75) ÷ _____ = –1(–75) ÷ _____ = –1 ( −𝟕𝟓)/⎕ = −1 (−75)/( −1) = ⎕ 75 = ⎕ ⎕ = 75 ∴ (−75) ÷ 75 = −1 Ex 1.3, 3 Fill in the blanks: (c) (–206) ÷ _____ = 1 (–206) ÷ _____ = 1 (− 𝟐𝟎𝟔)/⎕ = 1 (−206)/( 1) = ⎕ −206 = ⎕ ⎕ = −206 ∴ (−206) ÷ (−206) = 1 Ex 1.3, 3 Fill in the blanks: (d) – 87 ÷ _____ = 87−87 ÷ _____ = 87 ((−𝟖𝟕))/⎕ = 87 ((−87))/87 = ⎕ −1 = ⎕ ⎕ = −1 ∴ −87 ÷ (−1) = 87 Ex 1.3, 3 Fill in the blanks: (e) _____ ÷ 1 = – 87____ ÷ 1 = −87 ⎕/𝟏 = −87 ⎕ = −87 ∴ (−87) ÷ 1 = −87 Ex 1.3, 3 Fill in the blanks: (f) _____ ÷ 48 = –1____ ÷ 48 = –1 ⎕/𝟒𝟖 = –1 ⎕ = −1 × 48 ⎕ = −48 ∴ −48 ÷ 48 = −1 Ex 1.3, 3 Fill in the blanks: (g) 20 ÷ _____ = –220 ÷ _____ = –2 𝟐𝟎/⎕ = −2 20/((−2)) = ⎕ (−20)/2 = ⎕ −10 = ⎕ ∴ 20 ÷ (−10) = −2 Ex 1.3, 3 Fill in the blanks: (h) _____ ÷ (4) = –3____ ÷ 4 = −3 ⎕/𝟒 = −3 ⎕ = −3 × 4 ⎕ = −12 ∴ −12 ÷ 4 = −3