2.37×6.3+2.37×3.7 2.5×(1.25×0.32) 9.9×12.2
①7.8-3.5+2.2-6.5
②600÷[(160-76)÷7]
③70×4+90×4
④840÷35
⑤382×101-382
⑥12-1.56-0.44
①(-+)×24
②14.86﹣(6.28+2.36)﹣3.72
③÷[÷(-)]
④2.4×3.6+3.2×4.8
⑤+++......++
⑥××18×24