A.B. & ltC.﹦

2.6+□= 14。

A.5 B.8C.7

The formula of 3.8 is ().

13-7

4. 12 is greater than 8 (), and 8 is less than 12 ().

A.4，4B.4，3C.4，5

5. 1 class (1) There are 16 people skipping rope to play football in the playground, including 3 people skipping rope, 1 class (2) there are 1/people playing football, 1 class (//. The column type is ().

a . 16-3- 1 1 b . 16-3 c . 1 1-3

Objective: To master the calculation method of abdication subtraction flexibly and accurately within 20 years, encourage students to carefully analyze the relationship between conditions and problems, eliminate redundant conditions and improve their problem-solving ability.

Answer: 1. c； 2.b； 3.c； 4.a； 5. B.

Analysis: In the question 1, 13-6=7, 15-8=7, so13-6 =15-8; The second question is to find an addend according to subtraction, that is,14-6 = 8; In question 3, the number of options A is 6, the number of options B is 9, and the number of options C is 8. Question 4, 12-8=4, so 12 is 4 more than 8, and 8 is 4 less than 12; Question 5, 1 (2) Class has 1 1 people playing football, which is an unnecessary condition to be excluded. 1 class (1) The total number of people is 16, minus 3 people skipping rope, and the rest are football players.