早教吧 育儿知识 作业答案 考试题库 百科 知识分享

脱式计算.(能简算的要简算)7.02×1.021.125÷0.092001×0.54+2001×0.460.64×0.25+0.750.78÷26+0.5×0.02[2.8-2.8×(2.8-2.8)]÷0.78×[1÷(3.2-2.95)]33.4-26.465÷(2.6+4.1)

题目详情
脱式计算.(能简算的要简算)
7.02×1.02

1.125÷0.09
2001×0.54+2001×0.46 0.64×0.25+0.75
0.78÷26+0.5×0.02 [2.8-2.8×(2.8-2.8)]÷0.7
8×[1÷(3.2-2.95)] 33.4-26.465÷(2.6+4.1)
▼优质解答
答案和解析
(1)7.02×1.02,
=7.02×(1+0.02),
=7.02+7.02×0.02,
=7.02+0.1404,
=7.1604;

(2)1.125÷0.09,
=112.5÷9,
=12.5;

(3)2001×0.54+2001×0.46,
=2001×(0.54+0.46),
=2001×1,
=2001;

(4)0.64×0.25+0.75,
=0.16+0.75,
=0.91;

(5)[2.8-2.8×(2.8-2.8)]÷0.7,
=[2.8-2.8×0]÷0.7,
=2.8÷0.7,
=4;

(6)0.78÷26+0.5×0.02,
=0.03+0.01,
=0.04;

(7)8×[1÷(3.2-2.95)],
=8×[1÷0.25],
=8×4,
=32;

(8)33.4-26.465÷(2.6+4.1),
=33.4-26.465÷6.7,
=33.4-3.95,
=29.45.