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Calculs astucieux / 3 pts A l'aide de la distributivité et/ou des identités remarquables, effectuer les calculs suivants : 1) 16 × 103 2) 15 x 98 3) 99 × 101
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Mar 4, 2024
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Calculs astucieux
/ 3 pts
A l'aide de la distributivité et/ou des identités remarquables, effectuer les calculs suivants :
1) 16 × 103
2) 15 x 98
3) 99 × 101
Mathematics
college
YogendraR
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16 * 103:
103 = 100 + 3
16 * 100 = 1600
16 * 3 = 48
1600 + 48 = 1648
15*98:
98 = 100 - 2
15 * 100 = 1500
15 * 2 = 30
1500 - 30 = 1470
99*101=
100 = 100 + 1
99*100 = 9900
99*1 = 99
9900+99 = 9999
Wulf
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Mar 8, 2024
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Wulf
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