直接写出得数.5×60= 96÷3= 84÷2= 70﹣18= 900+500=80÷4= 46÷2= 68+17= 71﹣24= 900+70=1300﹣600= 1300﹣60= 300×7= 0×53= 201×4=44÷4= 200×3= 3×271= += ﹣=
(1)3.72×3.5+62.8×0.35 (2)9.9×8.6+0.86 (3)15.02﹣6.8﹣1.02﹣3.2 (4)725÷0.125÷0.25÷32 (5)8888888×77777777÷1111111÷2222222﹣9999999÷3333333.
4×2.5÷0.25×5.
20.06×65+380×2.006﹣2.006×30.
64×2.5×0.1253×0.8+3×2.23.76÷0.4÷2.5 (14.21+3.5)÷74.66×0.28+4.66×0.82﹣4.662.4+57.6÷36.
脱式计算.(能简算的要简算) 15.58÷8.2﹣0.729.6+9.9×99 8×3.6+1.4×2.80.74×4×0.25×4.