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9.1×4.8×4又2分之1÷1.6÷20分之3÷1.3 要简便运算

9.1×4.8×4又2分之1÷1.6÷20分之3÷1.3 =(9.1÷1.3)×(4.8÷1.6)×(2分之9÷20分之3) =7×3×30 =630 供参考 有疑问请追问

9.1*4.8*7又二分之一÷1/4÷1.3÷1.6 =(9.1÷1.3)×(4.8÷1.6)×15/2×4 =7×3×30 =630

9.1x3.6x4又5分之4÷1又10分之3÷5分之3÷25分之6 =9.1x3.6x4.8÷1.3÷0.6÷0.24 =(9.1÷1.3)x(3.6÷0.6)x(4.8÷0.24) =7x6x20 =840

x=9.1/1.3 x=7

36+79=115; 15÷1%=1500; 9.1-1.9=7.2; 7.2÷0.6=12;0.25×8=2; 4 5 ÷ 2 3 = 6 5 ; 1 4 - 1 5 = 1 20 ; 8 9 × 3 4 = 2 3 ;1+30%=130%; 1 2 + 5 7 = 17 14 ; 0.5 2 =0.25 9π=28.26.

10.42-0.4=10.02 12.2+0.8=13 56+34=1912 9.1×413=2.8 34÷75%×43=43 8×12.5=100 25×50%=15 10÷10%=100 1÷13+613=713 0÷13÷12=0

0.25×3=0.75 9.1÷1.3=7 0.56×100=56 4.5÷0.9=5 1÷0.05=20 3.3×0.4=1.32 6.4÷0.08=80 0.81÷0.9=0.9 5.1÷1.7=3 1×0.845=0.845 15÷0.15=100 4.2÷0.14=30

(1)[11.4-(9.1× 6 7 +1.2)]÷1 3 5 +1÷0.25,=[11.4-(7.8+1.2)]÷1 3 5 +1÷0.25,=[11.4-9]÷1 3 5 +1÷0.25 =2.4÷1 3 5 +1÷0.25,=1.5+4,=5.5;(2)4 1 2 ÷[2 2 5 -( 3 4 ×1 1 3 +0.4)]-1.75,=4 1 2 ÷[2 2 5 -(1+0.4)]-1.75,=4 1 2 ...

(1)0.3×0.2=0.06 (2)2.4÷10=0.24 (3)4.2÷0.7=6 (4)3.6÷12=0.3 (5)1.2×5=6 (6)9.1÷7=1.3 (7)15×0.6=9 (8)0.8-0.35=0.45 (9)0.78÷0.3=2.6 (10)0.25×4=1 (11)7.5÷0.15=50 (12)1÷0.25=4

0.65×4=2.6;0.99÷3=3.3;1÷4=0.25;4.2÷3=1.4;1-0.2÷0.2=0;10x-7.8x=2.2x;23.1×0.1=2.31;9.1÷7=1.3;2.5×4×12=120;1.05×100=105;0×3.75a=0;3.5×4=14.

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