小红在9点与10点之间开始解一道数学题，当时时针和分针正好成一条直线，当小红解完这道题时，时针和分针刚好第一次重合，小红解这道题用了多少时间？
+62.5%= 78×9.9+7.8= 7×÷7×=+= 3.2万+1.8万= 4×2.7×0.25= 5﹣0.25+0.75= 0.42﹣0.32=
直接写出得数 1÷= 0.4+4.73=÷=+=×=+0.8=×÷×=（+）×120=
口算：÷62.5%=÷8= 1.8÷= 0.375+﹣0.01=×÷×= 0.25×4÷=×÷×= 19÷= 0.125××8= 6.4×﹙1﹣1.25﹚=
直接写得数 36+48= 920﹣460= 570÷10= 12.5÷0.5= 4﹣2.4= 0.125×8= 3.6×25%=×= 3.5+4.7= 0.23÷0.1=÷3=÷=
直接写得数． 1÷=×=+= 2﹣= 4.2×0.5= 0.25×0.6= 246+198=﹣==== 84.6+4== 10÷0.5== 603×39≈ 4980÷51≈ 9.3÷0.03=÷2÷= 9﹣﹣．
+62.5%= 78×9.9+7.8= 7×
÷7×
+
=
= 0.4+4.73=
÷
=
=
×
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+0.8=
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÷62.5%=
÷8= 1.8÷
= 0.375+
﹣0.01=
×
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=
×
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= 0.125×
×8= 6.4×﹙1
﹣1.25﹚=
×
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=
×
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+
= 2﹣
=
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=
=
=
= 84.6+4=
= 10÷0.5=
= 603×39≈
÷2÷
﹣
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