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怎样简便就怎样计算.25×7×8420÷4÷535×10256×67+33×5648×25270÷45721-303435-11-49-4062×9983×201-8399×25+25(25+22)×4264×33-64×33107+98+393+202.

题目详情
怎样简便就怎样计算.
25×7×8420÷4÷535×10256×67+33×56
48×25270÷45721-303435-11-49-40
62×9983×201-8399×25+25(25+22)×4
264×33-64×33107+98+393+202.
▼优质解答
答案和解析
(1)25×7×8
=(25×8)×7
=200×7
=1400

(2)420÷4÷5
=420÷(4×5)
=420÷20
=21

(3)35×102
=35×(100+2)
=35×100+35×2
=3500+70
=3570

(4)56×67+33×56
=56×(67+33)
=56×100
=5600

(5)48×25
=12×4×25
=12×(4×25)
=12×100
=1200

(6)270÷45
=270÷(9×5)
=270÷9÷5
=30÷5
=6

(7)721-303
=721-(300+3)
=721-300-3
=421-3
=418

(8)435-11-49-40
=435-(11+49+40)
=435-100
=335

(9)62×99
=62×(100-1)
=62×100-62×1
=6200-62
=6138

(10)83×201-83
=83×(201-1)
=83×200
=16600

(11)99×25+25
=25×(99+1)
=25×100
=2500

(12)(25+22)×4
=25×4+22×4
=100+88
=188

(13)264×33-64×33
=33×(264-64)
=33×200
=6600

(14)107+98+393+202
=(107+393)+(98+202)
=400+300
=700