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脱式计算.(能简算的请写出简算过程)10×[34×(71...

(1)1.29+3.7+0.71+6.3=1.29+0.71+(6.3+3.7)=2+10=12;(2)528×78+472×78=(528+472)×78=1000×78=78000;(3)125×89×8=125×8×89=1000×89=89000;(4)57×101-57=57×(101-1)=57×100=5700;(5)19×96-962÷74=1824-13=1811;(6)(520+48...

①624-298=624-(300-2)=624-300+2=324+2=326②0.8×〔13-(3.012+5.28)〕=0.8×(13-5.292)=0.8×7.708=6.1664③19.4×0.9+0.1×19.4=19.4×(0.9+0.1)=19.4×1=19.4④147+87+53+11=(147+53)+(87+11)=200+98=298⑤5.6-0.71-0.29=5.6-(0.71+0.29)=...

(1)240÷15÷4,=240÷(15×4),=240÷60,=4;(2)129+318+71,=(129+71)+318,=200+318,=518;(3)304+278,=(300+4)+(300-22),=300+300-(22-4),=600-18,=582;(4)25×(17×8),=25×8×17,=(25×4)×(2×17),=100×34,=3400...

简便运算35+71+75+29脱式 35+71+75+29 =35+75+71+29 =110+100 =210

=71×19+322÷23 =71×19+14 =71×20-71+14 =1420-57 =1363

=46✘(71-1) =46✘70 =3220

(1)(6105-435)÷14,=5670÷14,=405;(2)46.71-6.81-3.19,=46.71-(6.81+3.19),=46.71-10,=36.71;(3)100-45÷0.9+0.75,=100-50+0.75,=50+0.75,=50.75;(4)63×( 4 9 + 5 7 ),=63× 4 9 +63× 5 7 ,=28+45,=73;(5) 3 5 × 5...

8.3×2.9+0.71×83 =8.3×2.9+7.1×8.3 =8.3×(2.9+7.1) =8.3×10 =83

(1)12×28+567÷21,=336+27,=363;(2)336÷(12+750÷25),=336÷(12+30),=336÷42,=8;(3)560-912÷24×5,=560-38×5,=560-190,=370;(4)592÷(71-34)×16,=592÷37×16,=16×16,=256.

71场28家29场28用简便方法用脱式计算 71场28家29场28 =28*(71+29) =28*100 =2800

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