4.5×5.2+4.5×4.8
4.04×25
2.4+7.6×3
20﹣1.37﹣2.63
4.6×0.5-1.94 15.89×0.35+0.65×15.89
20.9-8.25-1.75 4×20×0.25
①54×98
②(+﹣)×24
③4.86×[1÷(2.1﹣2.09)]
④8﹣
①(-+)×24
②14.86﹣(6.28+2.36)﹣3.72
③÷[÷(-)]
④2.4×3.6+3.2×4.8
⑤+++......++
⑥××18×24
①216÷(18×6)
② × + ÷
③( - )× ×36
④125%×2.5×3.2
⑤4.67-(0.67+2.98)
⑥ ÷[2÷( - )]