Toán Lớp 5: 15,29 * 73 + 15,29 + 5 * 15,29 + 15,29 * 21
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Toán Lớp 5: 15,29 * 73 + 15,29 + 5 * 15,29 + 15,29 * 21
tính bằng cách thuận tiện
Comments ( 2 )
15,29 xx 73 + 15,29 + 5 xx 15,29 + 15,29 xx 21
= 15,29 xx 73 + 15,29 xx 1 + 5 xx 15,29 + 15,29 xx 21
= 15,29 xx ( 73 + 1 + 5 + 21)
= 15,29 xx 100
= 1529
15,29xx73+15,29+5xx15,29+15,29xx21
=15,29xx73+15,29xx1+5xx15,29+15,29xx21
= 15,29xx(73+1+5+21)
= 15,29xx 100
= 1529