能简算的要简算.15.6﹣8.9+5.6 7.02+3.8+3.98+2.2 68.4﹣(4.7+8.4)35.8﹣(40﹣44.2) 100﹣13.72﹣36.82 47.35+16.88﹣7.35.
用递等式计算:(能简算的要简算) (1)21.36÷0.8﹣12.9(2)15.4×103﹣1.54×30 (3)29.61÷9.4×1.4(4)(16.2﹣0.54)÷1.8.
直接写出得数. 0.001+10.099=100﹣0.19=3.9×0.01=0.22= 0.5+0.5÷0.5=32.5÷(2.5×0.4)=3×3÷3×3=3.16÷0.1÷0.1=
①8(2x+2.6)=32 ②1.25×3.2×2.5 ③4.6×2.89+6.11×4.6+4.6 ④1995×1995+1994×1994﹣1995×1994﹣1994×1993.
计算下面各题,能简便的要写出简便运算过程. ①0.75×2.8+0.75×7.2 ②1.01×101﹣1.01 ③40.4×2.5 ④45.8﹣2.72÷0.8×12.5 ⑤(2.83+7.17)÷(1﹣0.9)
4.5×0.4+0.4×5.5.