计算:33×34+34×35+35×36+36×37+37×38=______.
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/30 00:09:06
计算:33×34+34×35+35×36+36×37+37×38=______.
![计算:33×34+34×35+35×36+36×37+37×38=______.](/uploads/image/z/2179580-68-0.jpg?t=%E8%AE%A1%E7%AE%97%EF%BC%9A33%C3%9734%2B34%C3%9735%2B35%C3%9736%2B36%C3%9737%2B37%C3%9738%3D______%EF%BC%8E)
解;33×34+34×35+35×36+36×37+37×38,
=33×(35-1)+34×35+35×36+(35+1)×37+(35+2)×38,
=33×35-33+34×35+35×36+35×37+37+35×38+2×38,
=35×(33+34+36+37+38)-33+37+76,
=35×(200-22)+80,
=7000-770+80,
=6310.
=33×(35-1)+34×35+35×36+(35+1)×37+(35+2)×38,
=33×35-33+34×35+35×36+35×37+37+35×38+2×38,
=35×(33+34+36+37+38)-33+37+76,
=35×(200-22)+80,
=7000-770+80,
=6310.
计算:33×34+34×35+35×36+36×37+37×38=______.
计算:39×37-13×34=______.
计算:98°45′36″+71°22′34″=______.
计算:1+3-2+2+4-3+3+5-4+4+6-5+…+36+38-37=______.
计算99999×7+11111×37=______.
计算:19.98×37-199.8×1.9+1998×0.82=______.
计算36×1.09+1.2×67.3=______.
先找规律再计算.120+130+140+150+160+170+180+190=______×______;330+34
计算:33°18′=______°.
计算:33°52′+21°54′=______度______分.
简便计算36*35/34
计算:201×73÷37+201×891÷111+1=______.