ᠳᠥᠷᠪᠡᠳᠦᠭᠡᠷ ᠣᠨ ᠤ ᠲᠤᠭᠠ 四年级数学19.pptx
论,练,展,算,, ᠦᠭᠡᠢ ᠵᠢᠮᠡ ᠶᠤᠰᠤ ᠨᠤᠭᠲᠠᠪᠦᠷᠢ ᠬᠤᠪᠢᠷᠠᠬᠤ ,600 ÷3 = 480 ÷ 48 = 600 ÷30 = 480 ÷ 24=,20 ÷5 = 2400 ÷10 = 40 ÷5 = 1200 ÷ 10 =,14 ÷ 2﹦,140÷20﹦,,280÷40﹦,560÷80﹦﹦,7,7,7,7,,560÷80 ﹦7,14 ÷ 2 ﹦7,140÷20 ﹦7,280÷40 ﹦7,560÷80 ﹦7,7,7,7,7, ᠬᠤᠪᠢᠷᠠᠭᠰᠠᠨ ᠦᠭᠡᠢ ᠪᠤᠢ︖ ᠨᠤᠭᠲᠠᠪᠦᠷᠢ ᠨᠢ ᠶᠠᠭᠠᠬᠢᠭᠠᠳ ᠪᠦᠷ ᠬᠤᠪᠢᠷᠠᠭᠰᠠᠨ ᠪᠠᠢᠬᠤ ᠲᠤ ᠬᠤᠪᠢᠶᠠᠭᠲᠠᠭᠴᠢ ᠪᠠ ᠬᠤᠪᠢᠶᠠᠭᠴᠢ ᠨᠢ ,560÷80 ﹦7,2--4,14 ÷ 2 ﹦7,140÷20 ﹦7,280÷40 ﹦7,1--4,3--4,2--3,1--3,2--3,1--3,1--2,3--4,1--4,1--2,,,2--4, ᠦᠵᠡ︕ ᠶᠠᠷᠢᠵᠦ ᠪᠠᠨ ᠢᠯᠡᠷᠡᠬᠦᠯᠦᠯᠲᠡ ᠴᠢ ᠦᠪᠡᠷ ,14 ÷ 2 ﹦,140÷ 20 ﹦,, × 10,, × 10,,7,7,140 ÷20 ﹦,280 ÷ 40 ﹦,, × 2, × 2,,7,7,,14 ÷,, × 1, ᠬᠤᠪᠢᠷᠠᠬᠤ ᠦᠭᠡᠢ ᠨᠤᠭᠲᠠᠪᠦᠷᠢ ᠨᠢ , ᠬᠤᠪᠢᠷᠠᠬᠤ ᠦᠭᠡᠢ ᠨᠤᠭᠲᠠᠪᠦᠷᠢ ᠨᠢ ,14 ÷ 2 ﹦,140÷ 20﹦,÷10,77,7,,,÷10,,280 ÷ 40 ﹦,560 ÷ 80 ﹦﹦,÷2,÷2,7,,,,7,14 ÷ 2,140÷ 20,÷1,7,, ᠬᠤᠪᠢᠷᠠᠬᠤ ᠦᠭᠡᠢ ᠨᠤᠭᠲᠠᠪᠦᠷᠢ ᠨᠢ , ᠬᠤᠪᠢᠷᠠᠬᠤ ᠦᠭᠡᠢ ᠨᠤᠭᠲᠠᠪᠦᠷᠢ ᠨᠢ ,,,14 ÷ 2 = 7,,, × 0, × 0,,︖ ,,,,÷0,÷0,420÷60=,42÷ 6 =,7,7,7200÷800=,72 ÷ 8 =,9,9,4000÷500=,,,4000,500,,,,,8,40,,0,8,42,6,72,8, ᠪᠤᠲᠤ︕ ᠲᠦᠷᠭᠡᠨ ᠰᠡᠲᠦᠪ ᠦᠳ ᠲᠤᠤᠷᠠᠬᠢ ᠦᠨᠲᠦᠰᠦᠯᠡᠨ ᠵᠢᠮᠡ ᠶᠤᠰᠤ ᠦᠭᠡᠢ ᠬᠤᠪᠢᠷᠠᠬᠤ ᠨᠤᠭᠲᠠᠪᠦᠷᠢ ,72÷9=,720÷90=,7200÷900=,36÷3=,360÷30=,80÷4=,3600÷300=,800÷40=,8000÷400=,8,8,8,12,12,12,20,20,20, ᠤᠷᠤᠯᠲᠤᠶᠠ︕ ,,200÷50= ︵200︶ ÷ ︵50︶︶ ,,,,,
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