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用递等式计算(能简算的要用简便方法计算).4.32+3.2+5.6879×101-79132+25×820- 3 25 ×5
用递等式计算(能简算的要用简便方法计算).4.32+3.2+5.6879×101-79132+25×820-325×5(0.125×8-0.5)×4(0.25+58)÷(...
用递等式计算(能简算的要用简便方法计算).4.32+3.2+5.6879×101-79132+25×820- 3 25 ×5(0.125×8-0.5)×4(0.25+ 5 8 )÷( 7 4 - 7 8 )
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(1)4.32+3.2+5.68 =4.32+5.68+3.2, =10+3.2, =13.2; (2)79×101-79 =(101-1)×79, =100×79, =7900; (3)132+25×8 =132+200, =332; (4)20-
=20-
=19
(5)(0.125×8-0.5)×4 =(1-0.5)×4, =0.5×4, =2; (6)(0.25+
=(
=
=1. |
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