Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
21 + 20 = ______
37 + 20 = ______
35 + 20 = ______
4 × 10 = ______
12 + 20 = ______
16 + 10 = ______
7 × 10 = ______
71 − 10 = ______
92 − 10 = ______
75 − 10 = ______
8 × 10 = ______
87 − 10 = ______
29 + 10 = ______
39 − 10 = ______
40 − 10 = ______
41 − 10 = ______
51 + 20 = ______
88 − 10 = ______
41 + 20 = ______
18 + 10 = ______
