Physics 7.3.2 Doppler Effect for EM Waves

1.1 - Addition (up to sum 10)

1.1.1 - Addition Sentences (up to sum 10).mp4

1.6.3 - Find the subtraction sentence by pattern - numbers up to 20

1.6.2 - Select the incorrect subtraction sentence - numbers up to 20

1.6.1 - Understanding more-less than

1.6 - Answering Questions (numbers up to 20)

1.5.5 - Subtracting by grouping

1.5.4 - Subtracting using tens and ones

1.5.3 - Word problems - Subtraction with pictures - cross out (numbers to 20)

1.5.2 - Subtracting by cross out with pictures - numbers up to 20

1.5.1 - Subtraction with pictures - by counting back

1.5 - Subtraction (numbers up to 20)