一根绳子长32米,用去它的,还剩多少米?
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(1)1.3﹣3.79+9.7﹣6.21(2)3.64÷4+4.36×0.25 (3)÷(﹣)×(﹣)(4)9×4.25+4× (5)(﹣)×4×9(6)1+2+3+4+…+49+50.
36.3×5.5+6.37×55.
999×999﹣2×999+1.
2.5×(1.9+1.9+1.9+1.9)