Bonjour,
Ex. 50 :
1) 2/3 × 3/7 = 6/21
2) 1 - 3/7 = 4/7
3) 2/3 × 4/7 = 8/21
4) a) 630 × (1 / 2/3) = 630 × 1/3 = 210
b) 630 × 6/21 = 180
c) 630 × 8/21 = 240
Ex. 51 :
28 × 3/4 = 21 21 - 13/2 = 29/2
28 ÷ 7/2 = 8 8 + 13/2 = 29/2
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Bonjour,
Ex. 50 :
1) 2/3 × 3/7 = 6/21
2) 1 - 3/7 = 4/7
3) 2/3 × 4/7 = 8/21
4) a) 630 × (1 / 2/3) = 630 × 1/3 = 210
b) 630 × 6/21 = 180
c) 630 × 8/21 = 240
Ex. 51 :
28 × 3/4 = 21 21 - 13/2 = 29/2
28 ÷ 7/2 = 8 8 + 13/2 = 29/2