用递等式计算 (1)6.5×(10-3.7)+2.98 (2)[4.75+8.4÷(9.2-6.8)]×40 (3)19.8-0.6×0.6
用递等式计算(1)6.5×(10-3.7)+2.98(2)[4.75+8.4÷(9.2-6.8)]×40(3)19.8-0.6×0.6-0.64(4)12.773-[4....
用递等式计算 (1)6.5×(10-3.7)+2.98 (2)[4.75+8.4÷(9.2-6.8)]×40 (3)19.8-0.6×0.6-0.64 (4)12.773-[4.5×(0.75-0.356)+9.23] (5)2.48×(7.3-5.8)+1.5×7.52 (6)0.125×7.9×16 (7)(6.4+0.88)÷0.8+3.2×1.25 (8)24-[5.4+(0.6+1.38÷0.23)].
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(1)6.5×(10-3.7)+2.98, =6.5×6.3+2.98, =40.95+2.98, =43.93; (2)[4.75+8.4÷(9.2-6.8)]×40, =[4.75+8.4÷2.4]×40, =8.25×40, =330; (3)19.8-0.6×0.6-0.64, =19.8-(0.36+0.64), =19.8-1, =18.8; (4)12.773-[4.5×(0.75-0.356)+9.23], =12.773-[4.5×0.394+9.23], =12.773-1.773-9.23, =11-9.23, =1.77; (5)2.48×(7.3-5.8)+1.5×7.52, =2.48×1.5+1.5×7.52, =1.5×(2.48+7.52), =1.5×10, =15; (6)0.125×7.9×16, =0.125×7.9×(2×8), =0.125×8×7.9×2, =1×7.9×2, =15.8; (7)(6.4+0.88)÷0.8+3.2×1.25, =7.28÷0.8+3.2×1.25, =9.1+4, =13.1; (8)24-[5.4+(0.6+1.38÷0.23)], =24-[5.4+(0.6+6)], =24-[5.4+0.6+6], =24-12, =12. |
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