2个回答
展开全部
(1)4.3+0.98+0.7
(2) 7.5+4.9-6.5
(3) 6.27-2.9-3.1
(4) 6.29+3.8+2.71+6.2
(5) 8.54-(3.4+2.54)
(6) 4.02-3.5+0.98
(7) 23.4-3.7-7.3
(8) 13.56-(9.8+2.56)
(9) 13.64-2.8-2.64
(10) 37.5+1.02
(11)4.83-2.05
(12) 30.54-9.9
(13)8.7+0.3-8.7+0.3
(14)6.65-0.82-0.18+2.35
(15)12.13+7.15-1.13+2.85
(16)11.26-8.73+2.73
(17)7.86+4.68-2.86
(18)15.67+8.94-0.67
(2) 7.5+4.9-6.5
(3) 6.27-2.9-3.1
(4) 6.29+3.8+2.71+6.2
(5) 8.54-(3.4+2.54)
(6) 4.02-3.5+0.98
(7) 23.4-3.7-7.3
(8) 13.56-(9.8+2.56)
(9) 13.64-2.8-2.64
(10) 37.5+1.02
(11)4.83-2.05
(12) 30.54-9.9
(13)8.7+0.3-8.7+0.3
(14)6.65-0.82-0.18+2.35
(15)12.13+7.15-1.13+2.85
(16)11.26-8.73+2.73
(17)7.86+4.68-2.86
(18)15.67+8.94-0.67
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