递等式计算(能简算的要简算)4920÷24×20.425-13×127257+1.85+127+7.151.4+(58-0.25)÷1141.4×329-125×2293.3×[38+315÷(134-0.15)].-数学
+1.85+1
+7.15
=(2
+1
)+(1.85+7.15)
=4+9
=13;
1.4+(
-0.25)÷1
=1.4+0.375÷1.25
=1.4+0.3
=1.7;
1.4×3
-1
×2
=1.4×(3
-2
)
=1.4×1
=1.4;
3.3×[38+3
÷(1
÷0.15)]
=3.8×[38+
÷(
×
)]
=3.8×[38+
÷
]
=3.8×[38+
×
]
=3
×38
=
×
=
2 |
7 |
=(2
5 |
7 |
2 |
7 |
=4+9
=13;
1.4+(
5 |
8 |
1 |
4 |
=1.4+0.375÷1.25
=1.4+0.3
=1.7;
1.4×3
2 |
9 |
2 |
5 |
2 |
9 |
=1.4×(3
2 |
9 |
2 |
9 |
=1.4×1
=1.4;
3.3×[38+3
1 |
5 |
3 |
4 |
=3.8×[38+
16 |
5 |
7 |
4 |
20 |
3 |
=3.8×[38+
16 |
5 |
35 |
3 |
=3.8×[38+
16 |
5 |
3 |
35 |
=3
4 |
5 |
48 |
165 |
=
19 |
5 |
6318 |
165 |
=