磷0.93+5.45+4.55
计算下面各题,能简算的请用简便方法计算.8.38+9.43+6.625.86-1.77+2.5447.2+8.6-7.228.6-3.8-14.6-6.28-2.6-1....
计算下面各题,能简算的请用简便方法计算. 8.38+9.43+6.62 5.86-1.77+2.54 47.2+8.6-7.2 28.6-3.8-14.6-6.2 8-2.6-1.77 7.4+0.93-4.36 17.34-(9.8+6.34) 0.93+5.45+7.07+4.55.
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(1)8.38+9.43+6.62,
=8.38+6.62+9.43,
=15+9.43,
=24.93;
(2)5.86-1.77+2.54,
=5.86+2.54-1.77,
=8.4-1.77,
=6.63;
(3)47.2+8.6-7.2,
=47.2-7.2+8.6,
=40+8.6,
=48.6;
(4)28.6-3.8-14.6-6.2,
=(28.6-14.6)-(3.8+6.2),
=14-10,
=4;
(5)8-2.6-1.77,
=5.4-1.77,
=3.63;
(6)7.4+0.93-4.36,
=8.33-4.36,
=3.97;
(7)17.34-(9.8+6.34),
=17.34-9.8-6.34,
=17.34-6.34-9.8,
=11-9.8,
=1.2;
(8)0.93+5.45+7.07+4.55,
=(0.93+7.07)+(5.45+4.55),
=8+10,
=18.
=8.38+6.62+9.43,
=15+9.43,
=24.93;
(2)5.86-1.77+2.54,
=5.86+2.54-1.77,
=8.4-1.77,
=6.63;
(3)47.2+8.6-7.2,
=47.2-7.2+8.6,
=40+8.6,
=48.6;
(4)28.6-3.8-14.6-6.2,
=(28.6-14.6)-(3.8+6.2),
=14-10,
=4;
(5)8-2.6-1.77,
=5.4-1.77,
=3.63;
(6)7.4+0.93-4.36,
=8.33-4.36,
=3.97;
(7)17.34-(9.8+6.34),
=17.34-9.8-6.34,
=17.34-6.34-9.8,
=11-9.8,
=1.2;
(8)0.93+5.45+7.07+4.55,
=(0.93+7.07)+(5.45+4.55),
=8+10,
=18.
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