B .
①25.35+4.35+2.65-4.35 ②136.8-(10.55+36.8) ③99×56+56
④6.2+5.18+2.8 ⑤98×4.5+2×4.5 ⑥3.63-1.25+17.37-8.75
-
)]×
×
①16.3×9+16.3
②98×0.51
③1.25×16×2.5
④(0.8+8)×12.5
⑤5.2×10.1
⑥2.5×3.7+63×0.25
如果★×●=100,那么(★×2.7)×●=。

①6.7+3.3×1.2
②1.25×8.8
③8.53+6-8.53+6
④0.45×0.55-0.45×0.45
⑤2.74×9.5+5×0.274
⑥8.4÷0.6+8.4÷0.4
⑦7.75×[20÷(3.24-3.04)]
①15.4-5.44×1.05
②4.75-3.79+11.25-4.21
③49×0.125×8
④0.48×99+0.48
①5.42+7.26+4.58+2.74
②66.78-5.65-4.35
③157×45+43×45
④8×(27×125)
⑤36.28+18.69-6.28