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(3.75%3.75x0.4)1.3+0.2简便计算

(1)62.8×19-8×6245-6245,=62.8×(19-8-1),=62.8×10,=628;(2)9511-(3.75+4511),=9511-3.75-4511,=9511-4511-3.75,=5-3.75,=1.25;(3)10.04-[1-(1-0.5×13)],=10.04-[1-(1-16)],=10.04-[1-56],=10.04-16,=25-16,=2456;...

(8.25-3.75)÷2.5÷4 =4.5÷(2.5×4) =4.5÷10 =0.45

1.84÷2.3×0.25 =4.6×0.4×2.3×0.25 =(4.6÷2.3)×(0.4×0.25) =2×0.1 =0.2 3.75÷0.12-2.75 =375÷12-2.75 =125÷4-2.75 =31.25-2.75 =28.5 2.4×3.5+6.5÷1.3 =1.2×7+5 =8.4+5 =13.4

8.1÷(0.9×0.3) =8.1÷0.9÷0.3 =9÷0.3 =30 2.12-(1.12+3×0.33) =2.12-(1.12+0.99) =2.12-1.12-0.99 =1-0.99 =0.01 8.53+6-8.53+6 =(8.53-8.53)+(6+6) =0+12 =12 (8.25-3.75)÷2.5÷4 =4.5÷(2.5×4) =4.5÷10 =0.45

你敢用公式写出来吗

56×125+8 (125+4)×72 32×(125+25) 105-5×(4992÷48-86) 374-186-114 125×4+25×8 637-(237-65) 79×79-79+22×79 199×199 125×801 777×6+111×58 554×64+446×64 35×35+35×64+35 84×25 450÷【(393-388)×(6+4)】 15×27+73×16 73×165+73-73×66 4600÷...

(1)4.35+8.6+153.65+1.4=(4.35+153.65)+(8.6+1.4)=158+10=168;(2)19.32-5.56-3.44=19.32-(5.56+3.44)=19.32-9=10.32;(3)6.25-4.8+3.75-1.2=(6.25+3.75)-(4.8+1.2)=10-6=4;(4)29.44-(9.44+0.823)=29.44-9.44-0.823=20-0.8...

9.875-(3又8分之7-75%)+3又4分之1 =9.875-3又8分之7+75%+3又4分之1 =6+4 =10

(1)4×3.75+0.25=4×4=16=0(×)改正:4×3.75+0.25=15+0.25,=15.25;(2)6.4+3.6×5.3=10×5.3=53(×)改正:6.4+3.6×5.3=6.4+19.08=25.48;(3)15.8-0.8×2=15×2=30(×)改正:15.8-0.8×2=15.8-1.6,=14.2;(4)4.5×0.9+6.8=4.05+6.8=4.73.(...

1、4-3.5-[(-2.5-1.2+4)-6.9]=4-4-3.5+2.5+1.2+6.9=7.1 2、3.75-[(-8分之3)+(-2分之1)-(-6分之5)+4又3分之2]-0.125 =3+3/4+3/8+1/2-5/6-4-2/3-1/8 =(3-4)+[3/4+(3/8-1/8)]+(1/2-5/6-2/3) =-1+1+3/6-5/6-4/6 =-6/6 =-1

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