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1ãå£ç® 2.5+0.9 = 3.6+4.9 = 5.6 4.8 = 31.6= 3.06+ 4.4 = 8.8 +4.5= 5.2 + 4.8 = 32.9=
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3.64+1.48 22.32 +12.59 7.85 +1
1ãå£ç® 2.5 + 0.9 = 3.6 + 4.9 = 5.6 â 4.8 = 3â1.6= 3.06 + 4.4 = 8.8 + 4.5= 5.2 + 4.8 = 3â2.9=
2ã计ç®ä¸é¢åé¢å¹¶ä¸éªç®
3.64+1.48 22.32+12.59 7.85+13.6 65+6.35
8.24-7.58 10.21-5.59 32-14.57 48-0.26
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2.1+0.2= 0.3+0.7= 3.6+1.6= 7.5-0.5=
3.7-0.9= 2.13-0.02= 3.51+0.2= 102+0.3=
1.12-1.02= 4.5-0.01=
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(1)12.45-1.35-0.65
(2)21.32-(6.32+8.3)= 21.32-6.32+8.3 = 12.45-(1.35+0.65) = 15+8.3 =
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(1)27.3+73.2+72.7
(2) 585+189+215
(3) 5.85-1.75-0.25
(4)768-274-126
(5) 5.85+1.89+2.15
(6)24.8+14.6+15.4
(7)42.5-22.17-7.83
(8)3.8+1.37+6.2+12.63
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