实物帮我认识数运用生活中的物体帮学生认识数,利用身体的各部分帮学生建立长度单位的表象,利用身边的实物如一袋洗衣粉、盐等,帮学生建立1千克的表象,都可以很好地帮学生理解数和单位。实例帮我解算理数学来源于生活,生活中蕴藏着丰富的数学知识,需要我们用数学的眼光去观察、去发现、去应用。计算教学中也可运用熟悉的生活实例理解算理。教学减法的性质“从一个数里连续减去两个数,等于从这个数里减去两个数的和”时,我也尝 Help me understand the number of objects in real life to help students understand the number of objects, the use of various parts of the body to help students build the appearance of length units, using the kind of things such as a bag of detergent, salt, to help students create a 1 kilogram appearance, can Well to help students understand the number and unit. Examples to help me solve mathematical reasoning from life, life is rich in mathematical knowledge, we need to use mathematical perspective to observe, to discover, to apply. Computational teaching can also use the familiar examples of life to understand the calculation. The nature of the teaching subtraction “When I subtract two numbers consecutively from a number equal to the sum of two numbers subtracted from the number,” I also taste