Toán Lớp 4: Tinh bang cach thuan tien
6×2×210 +120-12×220
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Toán Lớp 4: Tinh bang cach thuan tien
6×2×210 +120-12×220
Comments ( 2 )
6×2×210+120-12×220
=(6×2×210)+120-(12×220)
=2520+120-2640
=2640-2640
=0
Giải đáp:
6×2×210 +120-12×220
= 12 xx 210 + 12 xx 10 – 12 xx 220
= 12 xx (210 + 10 – 220)
= 12 xx (220 – 220)
= 12 xx 0
= 0
$#dairana$