问题
解答题
怎样算简便就怎样算
2+2.7+7.3+6.8;9.8×10.1;0.72÷0.4÷0.3.
答案
①2+2.7+7.3+6.8
=(2.7+7.3)+(2+6.8)
=10+8.8
=18.8;
②9.8×10.1
=9.8×10+9.8×0.1
=98+0.98
=98.98;
③0.72÷0.4÷0.3
=0.72÷(0.4×0.3)
=0.72÷0.12
=6.
怎样算简便就怎样算
2+2.7+7.3+6.8;9.8×10.1;0.72÷0.4÷0.3.
①2+2.7+7.3+6.8
=(2.7+7.3)+(2+6.8)
=10+8.8
=18.8;
②9.8×10.1
=9.8×10+9.8×0.1
=98+0.98
=98.98;
③0.72÷0.4÷0.3
=0.72÷(0.4×0.3)
=0.72÷0.12
=6.