3.7×2.5= 0.37×2.5= 370×2.5=
52= x-0.9x= 3.6x+0.9x= 31.1×7.8=
2.4×5= 8.9÷2= a×0= 45.4+46=
9.9×9= 0.6-0.6×1= 44.4÷20= 11÷22=
①2.5×9.7×40
②54.4÷3.2×7.08
③21.4-20.5÷8.2
④32.5÷1.25÷8
⑤93.1×72-62×93.1
⑥26.5×(17.3+0.7)