①7.8×6.9+2.2×6.9
②4.7×10.2
③2.5×0.87×4
④8×(20-1.25)
⑤4.2×1.5-2.74
5.3÷0.1= 0.4×2.5= 6.2×3+1.5= 1.4×3÷1.4×3=
0.52= 5a×2a= 4.8x+0.8x= 12.1x÷11=
5.6÷0.5= 4.9×0.2= 0.81÷0.09= 1÷0.25=
8÷0.2= 3.4-0.34= 14÷5= 7.8÷0.01=
21÷7= 22.11÷6.7=
222.111÷66.7= 2222.1111÷666.7=
22222.11111÷6666.7=
222222.111111÷66666.7=
1.59÷5.3=15.9÷
×= 0.54÷6= ÷= 2.6×0.3= 27.8﹣1.9=
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