bonsoir
exercice 1
B=36 × 11
B=36×(10+1)
B=360+36
B=396
C=42×999
C=42×(1000-1)
C=42000-42
C=41958
D=37×101
D=37×(100+1)
D=3700+37
D=3737
E=84×19
E=84×(10+9)
E=840+84×9
E=840 + 84×(10-1)
E=840 +840 -84
E=1680-84
E=1596
F=29×99
F=29×(100-1)
F=2900-29
F=2871
exercice 2
A=6×7,3 +6 ×2,7
A=6(7,3+2,7)
A=6×10
A=60
B=4,6×3+5,4×3
B=3(4,6+5,4)
B=3×10
B=30
C=8,9×3,7-8,9×1,7
C=8,9(3,7-1,7)
C=8,9×2
C=17,8
D=182×98 -182×2
D=182(98-2)
D=182×96
D=17472
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bonsoir
exercice 1
B=36 × 11
B=36×(10+1)
B=360+36
B=396
C=42×999
C=42×(1000-1)
C=42000-42
C=41958
D=37×101
D=37×(100+1)
D=3700+37
D=3737
E=84×19
E=84×(10+9)
E=840+84×9
E=840 + 84×(10-1)
E=840 +840 -84
E=1680-84
E=1596
F=29×99
F=29×(100-1)
F=2900-29
F=2871
exercice 2
A=6×7,3 +6 ×2,7
A=6(7,3+2,7)
A=6×10
A=60
B=4,6×3+5,4×3
B=3(4,6+5,4)
B=3×10
B=30
C=8,9×3,7-8,9×1,7
C=8,9(3,7-1,7)
C=8,9×2
C=17,8
D=182×98 -182×2
D=182(98-2)
D=182×96
D=17472