计算下面各题.(能简算的要简算)3-25+4-35920÷40+1.1×50047÷9+57×19(56+112-38)÷1248×4×12.5×2.52003×20012002.-数学
题文
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答案
(1)3-
=(3+4)-(
=7-1, =6; (2)920÷40+1.1×500, =23+550, =573; (3)
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=(
=
=
(4)(
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题文
|
答案
(1)3-
=(3+4)-(
=7-1, =6; (2)920÷40+1.1×500, =23+550, =573; (3)
=
=(
=
=
(4)(
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