下面各题怎样简便就怎样算.3.7×99+3.734+16-385.37-1.47-2.53105×(13+15)13+45÷923×58+13×58.-数学
题文
下面各题怎样简便就怎样算. 3.7×99+3.7
5.37-1.47-2.53 105×(
13+45÷9
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答案
(1)3.7×99+3.7, =3.7×(99+1), =3.7×100, =370; (2)
=
=
(3)5.37-1.47-2.53, =5.37-(1.47+2.53), =5.37-4, =1.37; (4)105×(
=105×
=35+21, =56; (5)13+45÷9, =13+5, =18; (6)
=(
=1×
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