Toán Lớp 5: a )0,72 x 48 + 7,2 x 520 x 0,01
tinhs nhanh
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Toán Lớp 5: a )0,72 x 48 + 7,2 x 520 x 0,01
tinhs nhanh
Comments ( 2 )
a)0,72xx48+7,2xx520xx0,01
=0,72xx48+7,2xx0,1xx520xx0,1
=0,72xx48+0,72xx52
=0,72xx(48+52)
=0,72xx100
=72
a) 0,72 xx 48 + 7,2 xx 520 xx 0,01
= 0,72 xx 48 + 7,2 xx 0,1 xx 520 xx 0,1
= 0,72 xx 48 + 0,72 xx 52
= 0,72 xx (48 + 52)
= 0,72 xx 100
= 72