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2/5:x=16:10 4.5/8=3.6/x 7:x=4.8:9.6 1.6/1.2=9.

1、(x-4.5)÷7=1.6 x-4.5=1.6*7 x=1.6*7+4.5=15.7 2、(x+32)÷24=2.5 x+32=2.5*24 x=2.5*24-32=28 3、(x+8.6)÷2.4=64 x+8.6=64*2.4 x=64*2.4-8.6=145 4、 1.5(48-2x)=48 3(24-x)=48 24-x=16 x=24-16=8 5、 4.8÷1.2+0.5x=8.5 4+0.5x=8....

8.54÷0.7=12.2 6.84÷0.912=7.5 25.84÷1.7=15.2 99.6÷41.5=2.4 220.5÷147=1.5 36.8÷16=2.3 1.25÷0.25=5 0.72÷3.6=0.2 1.6...

5.3×6.3+2.3= 4.4×7.3+5.3= 4×8.8+1.5= 4.1×0.8-0.2= 9.9×1.4+0.6= 6.4×2.4+3.6= 12.48-4×9.7= 9.8×1.3-0.3= 4.8×9.1-0.5= 4.2×1.8-0.1= 5.59-3×4.3= 3.053-0.1×5.3= 9.4×8.4+5.8= 6.908-1.3×1.6= 13.596-9.1×5.6= 11.259-2.1×7.9= 7.3+3.8×2.3=...

(1)6x—0.5x=99 5.5x=99 x=99÷5.5 x=18 (2)9x—3×1.6=72.6 9x-4.8=72.6 9x=72.6+4.8 9x=77.4 x=77.4÷9 x=8.6 3)8x+4.5×3=53.5 8x+13.5=53.5 8x=53.5-13.5 8x=40 x=40÷8 x=5 (4)3(x+1.9)=7.8 x+1.9=7.8÷3 x+1.9= 2.6 x=2.6-1.9 x=0.7

0.52=0.250.53=0.1254.5×0.8=3.67.2×0.09=0.6480.18÷0.2=3.5÷7=0.50.16÷0.04=41.6÷0.5=3.20.8÷100=0.0081.98÷9=0.229-1.98=7.020.56÷2=0.280.17÷0.02=8.52.4÷0.03=800.048÷0.08=0.62.5÷0.4=6.258.2÷100=0.0821÷4=0.251÷0.1-9×0.1=9.10.27-0.09=0...

(1)7.8×10.1,=7.8×(10+0.1),=78+0.78,=78.78;(2)2.8×4.5+6.5×2.8,=2.8×(4.5+6.5),=2.8×11,=2.8×(10+1),=28+2.8,=30.8;(3)86.8+9.1÷(2.3-1.6),=86.8+9.1÷0.7,=86.8+13,=99.8;(4)9.12×0.25-0.88÷4,=2.28-0.22,=2....

5.3×6.3+2.3= 4.4×7.3+5.3= 4×8.8+1.5= 4.1×0.8-0.2= 9.9×1.4+0.6= 6.4×2.4+3.6= 12.48-4×9.7= 9.8×1.3-0.3= 4.8×9.1-0.5= 4.2×1.8-0.1= 5.59-3×4.3= 3.053-0.1×5.3= 9.4×8.4+5.8= 6.908-1.3×1.6= 13.596-9.1×5.6= 11.259-2.1×7.9= 7.3+3.8×2.3=...

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