①.1÷3/5×2/5+2/3 ②.9/10×1/3-3/20③5/12+5/4÷5/8×1/2 ④5÷7-1/7×3 ⑤7÷15-7/30×2 ⑥.1-4/7÷2×4/7【数学计算】

①.1÷3/5×2/5+2/3 ②.9/10×1/3-3/20③5/12+5/4÷5/8×1/2 ④5÷7-1/7×3 ⑤7÷15-7/30×2 ⑥.1-4/7÷2×4/7【数学计算】
①.1÷3/5×2/5+2/3 ②.9/10×1/3-3/20
③5/12+5/4÷5/8×1/2 ④5÷7-1/7×3 ⑤7÷15-7/30×2 ⑥.1-4/7÷2×4/7
【数学计算】

①.1÷3/5×2/5+2/3 ②.9/10×1/3-3/20③5/12+5/4÷5/8×1/2 ④5÷7-1/7×3 ⑤7÷15-7/30×2 ⑥.1-4/7÷2×4/7【数学计算】
①.1÷3/5×2/5+2/3
=1×5/3×2/5+2/3
=2/3+2/3
=4/3;
②.9/10×1/3-3/20
=3/10-3/20
=3/20;
③5/12+5/4÷5/8×1/2
=5/12+5/4×8/5×1/2
=5/12+1
=17/12;
④5÷7-1/7×3
=5/7-3/7
=2/7;
⑤7÷15-7/30×2
=7/15-7/15
=0;
⑥.1-4/7÷2×4/7
=1-4/7×1/2×4/7
=1-8/49
=41/49;
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(1)4/3,(2)3/20,(3)5/12,(4)4/7,(5)0,(6)41/49