(24.6+5.4)×(75﹣34.5÷2.3) 2.5×0.8×4×12.5
(2.8+2.8+2.8+2.8)×2.5 6+2.4+3+7.6
1800÷45= 6.4+9.6= 0.875﹣= 12×98≈
56×= 1.6×125%= ×24÷= 9+11+13+……+41=
×=
①27.59﹣(2.78+7.59)
②( + ﹣ )×3.6
③63.5×101
①( + + )÷
②12.7×99+12.7
③16.8÷[32×(1﹣ )]